The building is surrounded by a rock platform so you will need to head to the right and climb up some rocks. Once you are up on the platform, go around the building until you see a set of stairs you can climb.

Once you are up the stairs, you will need to make a side jump to here

and make these jumps once you get up top

And when you get to the final wood beam, you will need to make a long jump here.

Run around to the other side and make these jumps. When you are on the 2nd wooden beam, just jump to the stone floor.